Matthias Braun 332bb5c236 AArch64: Replace a RegScavenger instance with LivePhysRegs ...

findScratchNonCalleeSaveRegister() just needs a simple liveness
analysis, use LivePhysRegs for that as it is simpler and does not depend
on the kill flags.

This commit adds a convenience function available() to LivePhysRegs:
This function returns true if the given register is not reserved and
neither the register nor any of its aliases are alive.

Differential Revision: http://reviews.llvm.org/D21865

llvm-svn: 274685

2016-07-06 21:31:27 +00:00

6.1 KiB

Raw Blame History

View Raw